Process for fabricating a variable focus lens, the variable focus lens and pair of spectacles having a pair of openings for the lens.

摘要

"The process of fabricating a variable focus lens, the variable focus lens and pair of spectacles having a pair of openings for the lens.A variable focus lens comprises first and second flexible membranes (2) which are tensioned and which define a cavity (30) in which is sealed a transparent silicone oil (4).The adjustment of pressure or volume of the oil in the cavity varies the focal length of the lens.To manufacture the lens, the periphery of each membrane (2) is engaged between two rings (8, 10, 10, 12) of a set of three rings mutually coupled (8, 10, 12).The rings are mutually coupled together crinkled for tensioning the membranes (2) and seal the cavity (30).